<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 2.为 ECharts 准备一个定义了宽高的 DOM -->
      <div id="main" style="width: 750px;height:400px;"></div>
    </el-card>
  </div>
</template>

<script>
// 1.导入echarts
import * as echarts from "echarts"
import _ from "lodash"
export default {
  data() {
    return {
      // 请求倒数据
      reportsOptions:{},
      // 需要合并的数据
      options: {
        title: {
          text: '用户来源'
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#E9EEF3'
            }
          }
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: [
          {
            boundaryGap: false
          }
        ],
        yAxis: [
          {
            type: 'value'
          }
        ]
      }
    }
  },
  created(){
    this.getReports();
  },
  methods:{
    async getReports(){
      // 获取表单数据
      const {data:res} = await this.$http.get("reports/type/1");
      if(res.meta.status !== 200) {
        return this.$message.error(res.meta.msg);
      }
      // 保存数据
      this.reportsOptions = res.data;
      return this.$message.success(res.meta.msg);
    }
  },
  // 此时页面上的元素已经被渲染完了
  async mounted(){

    // 3.基于准备好的dom，初始化echarts实例
    var myChart = echarts.init(document.getElementById('main'));
    const {data:res} = await this.$http.get("reports/type/1");
      if(res.meta.status !== 200) {
        return this.$message.error(res.meta.msg);
      }
    // 4.准备数据和配置项
    // 指定图表的配置项和数据
    // 合并数据
   const result =  _.merge(res.data,this.options)
    

    // 5.展示数据
    myChart.setOption(result);
  }
}
</script>

<style>

</style>